Conceptual design framework: Environment and Natural Resources (ENR) directory. Integrated Enviromental Management for Sustainable Development.
Chicago-referens (17:e uppl.)Conceptual Design Framework: Environment and Natural Resources (ENR) Directory. Diliman, Quezon City: Integrated Enviromental Management for Sustainable Development.
MLA-referens (9:e uppl.)Conceptual Design Framework: Environment and Natural Resources (ENR) Directory. Integrated Enviromental Management for Sustainable Development.
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